Fix error message for non-defined objects in planner_objective
var n_bar S_bar;
model;
n_bar=1;
end;
planner_objective(chi*n_bar);
returns
ERROR: You cannot include exogenous variables in the planner objective. Please define an auxiliary endogenous variable like eps_aux=epsilon and use it instead of the varexo.
due to chi
not being defined as any type.